Add maintenance record history view

Author: Warren-SJ

backend/src/main/java/com/apexgrid/transformertracker/repo/MaintenanceRecordRepo.java

@@ -3,9 +3,11 @@
 import com.apexgrid.transformertracker.model.MaintenanceRecord;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface MaintenanceRecordRepo extends JpaRepository<MaintenanceRecord, String> {
     Optional<MaintenanceRecord> findByInspectionId(String inspectionId);
     boolean existsByInspectionId(String inspectionId);
+    List<MaintenanceRecord> findAllByInspection_Transformer_IdOrderByTimestampDesc(String transformerId);
 }

backend/src/main/java/com/apexgrid/transformertracker/web/InspectionController.java

@@ -14,6 +14,7 @@
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.NullNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.apexgrid.transformertracker.web.dto.MaintenanceRecordResponse;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.http.ContentDisposition;
 import org.springframework.http.HttpHeaders;
@@ -395,38 +396,6 @@ public record MaintenanceRecordRequest(
             String remarks
     ) { }
 
-    public record MaintenanceRecordResponse(
-            String id,
-            String inspectionId,
-            String inspectionDate,
-            String transformerName,
-            String timestamp,
-            String inspectorName,
-            String status,
-            BigDecimal voltage,
-            BigDecimal current,
-            BigDecimal efficiency,
-            String recommendation,
-            String remarks
-    ) {
-        static MaintenanceRecordResponse fromEntity(MaintenanceRecord record) {
-            return new MaintenanceRecordResponse(
-                    record.getId(),
-                    record.getInspection() != null ? record.getInspection().getId() : null,
-                    record.getInspectionDate(),
-                    record.getTransformerName(),
-                    record.getTimestamp(),
-                    record.getInspectorName(),
-                    record.getStatus(),
-                    record.getVoltage(),
-                    record.getCurrent(),
-                    record.getEfficiency(),
-                    record.getRecommendation(),
-                    record.getRemarks()
-            );
-        }
-    }
-
     @PostMapping("/{id}/analyze")
     public ResponseEntity<?> analyze(@PathVariable String id,
                                      @RequestParam("file") MultipartFile file,

backend/src/main/java/com/apexgrid/transformertracker/web/TransformerController.java

@@ -1,7 +1,9 @@
 package com.apexgrid.transformertracker.web;
 
 import com.apexgrid.transformertracker.model.Transformer;
+import com.apexgrid.transformertracker.repo.MaintenanceRecordRepo;
 import com.apexgrid.transformertracker.repo.TransformerRepo;
+import com.apexgrid.transformertracker.web.dto.MaintenanceRecordResponse;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.security.core.userdetails.UserDetails;
@@ -17,9 +19,12 @@
 @RequestMapping("/api/transformers")
 public class TransformerController {
     private final TransformerRepo repo;
+    private final MaintenanceRecordRepo maintenanceRecordRepo;
 
-    public TransformerController(TransformerRepo repo) {
+    public TransformerController(TransformerRepo repo,
+                                 MaintenanceRecordRepo maintenanceRecordRepo) {
         this.repo = repo;
+        this.maintenanceRecordRepo = maintenanceRecordRepo;
     }
 
     @GetMapping
@@ -86,4 +91,18 @@ public ResponseEntity<?> uploadBaseline(@PathVariable String id,
             }
         }).orElse(ResponseEntity.notFound().build());
     }
+
+    @GetMapping("/{id}/maintenance-records")
+    public ResponseEntity<?> listMaintenanceRecords(@PathVariable String id) {
+        var transformer = repo.findById(id).or(() -> repo.findByTransformerNumber(id));
+        if (transformer.isEmpty()) {
+            return ResponseEntity.status(404).body(Map.of("error", "Transformer not found"));
+        }
+        var payload = maintenanceRecordRepo
+                .findAllByInspection_Transformer_IdOrderByTimestampDesc(transformer.get().getId())
+                .stream()
+                .map(MaintenanceRecordResponse::fromEntity)
+                .toList();
+        return ResponseEntity.ok(payload);
+    }
 }

backend/src/main/java/com/apexgrid/transformertracker/web/dto/MaintenanceRecordResponse.java

@@ -0,0 +1,40 @@
+package com.apexgrid.transformertracker.web.dto;
+
+import com.apexgrid.transformertracker.model.MaintenanceRecord;
+
+import java.math.BigDecimal;
+
+public record MaintenanceRecordResponse(
+        String id,
+        String inspectionId,
+        String inspectionDate,
+        String transformerName,
+        String timestamp,
+        String inspectorName,
+        String status,
+        BigDecimal voltage,
+        BigDecimal current,
+        BigDecimal efficiency,
+        String recommendation,
+        String remarks
+) {
+    public static MaintenanceRecordResponse fromEntity(MaintenanceRecord record) {
+        if (record == null) {
+            return null;
+        }
+        return new MaintenanceRecordResponse(
+                record.getId(),
+                record.getInspection() != null ? record.getInspection().getId() : null,
+                record.getInspectionDate(),
+                record.getTransformerName(),
+                record.getTimestamp(),
+                record.getInspectorName(),
+                record.getStatus(),
+                record.getVoltage(),
+                record.getCurrent(),
+                record.getEfficiency(),
+                record.getRecommendation(),
+                record.getRemarks()
+        );
+    }
+}

frontend/components/InspectionDetailsPanel.tsx

@@ -3062,11 +3062,11 @@ const InspectionDetailsPanel = ({
                     </div>
                     <div className="grid grid-cols-1 sm:grid-cols-3 gap-4">
                       <div>
-                        <p className="text-xs uppercase tracking-wide text-gray-500">Voltage</p>
+                        <p className="text-xs uppercase tracking-wide text-gray-500">Voltage (V)</p>
                         <p>{maintenanceRecord.voltage ?? "—"}</p>
                       </div>
                       <div>
-                        <p className="text-xs uppercase tracking-wide text-gray-500">Current</p>
+                        <p className="text-xs uppercase tracking-wide text-gray-500">Current (A)</p>
                         <p>{maintenanceRecord.current ?? "—"}</p>
                       </div>
                       <div>
@@ -3163,7 +3163,7 @@ const InspectionDetailsPanel = ({
                       />
                     </label>
                     <label className="text-sm text-gray-700 dark:text-gray-200">
-                      <span className="block text-xs uppercase tracking-wide mb-1">Voltage</span>
+                      <span className="block text-xs uppercase tracking-wide mb-1">Voltage (V)</span>
                       <input
                         type="number"
                         step="any"
@@ -3175,7 +3175,7 @@ const InspectionDetailsPanel = ({
                       />
                     </label>
                     <label className="text-sm text-gray-700 dark:text-gray-200">
-                      <span className="block text-xs uppercase tracking-wide mb-1">Current</span>
+                      <span className="block text-xs uppercase tracking-wide mb-1">Current (A)</span>
                       <input
                         type="number"
                         step="any"